994408172197 has 12 divisors (see below), whose sum is σ = 1095174633420. Its totient is φ = 902231327360.

The previous prime is 994408172029. The next prime is 994408172203. The reversal of 994408172197 is 791271804499.

994408172197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 918988732321 + 75419439876 = 958639^2 + 274626^2 .

It is a de Polignac number, because none of the positive numbers 2^k-994408172197 is a prime.

It is a super-2 number, since 2×994408172197² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994408142197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8011348 + ... + 8134525.

It is an arithmetic number, because the mean of its divisors is an integer number (91264552785).

Almost surely, 2^994408172197 is an apocalyptic number.

It is an amenable number.

994408172197 is a deficient number, since it is larger than the sum of its proper divisors (100766461223).

994408172197 is a wasteful number, since it uses less digits than its factorization.

994408172197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16146404 (or 16146393 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 61.

The spelling of 994408172197 in words is "nine hundred ninety-four billion, four hundred eight million, one hundred seventy-two thousand, one hundred ninety-seven".